Mechanical Engineering - Engineering Mechanics - Discussion

Simple pendulum is simply a concentrated mass m attached to one of the ends of a mass-less cord of length l, while the other end is fitted as a point of oscillation, such that the mass is free to oscillate about that fixed point in the vertical plane.

The compound pendulum differs from the simple one in that it has a mass distribution along its length -that is its mass is not concentrated at a given point-, therefore it has a mass moment of inertia I about its mass centre.

Any rigid body that has a mass m, and mass moment of inertia I and suspended at a given distance h from its centre of gravity represents a compound pendulum.

Simple pendulum moves freely compound pendulum moves under force of gravity.

Here, the right answer is simple pendulum.

@All.

Here it is not said that the body is suspended with string or any thread so it is not a simple pendulum.

Thanks @Amisha.

You are right, @Amisha.

Oscillations made by rigid body forms compound pendulum.

In a simple pendulum the dimensions of the object in suspension is significantly smaller than the distance from the centre of gravity of the object to the axis of suspension. This allows us to treat the mass as though it were a single point.

And in a compound pendulum, the distance between the centre of gravity of the swinging body and the axis of suspension is comparable to the dimensions of the body.

@Panwar.

Thank you for the explanation!

Please let me know for the question posted, how you are considering it as compound pendulum because there is no description about distance or dimensions related to mass or C.O.G.

Here they mentioned "body". So if one body suspended and oscillated with small amplitude under the action of force. It is known as simple pendulum right? can you please give explanation.